Code-protected vehicle control system e.g. engine management - has code generator, e.g. magnetic card or infrared transmitter, for activating controllers contg. stored value for combining with received and decoded value in OR=gate

摘要

A circuit (2) is provided for data transfer between a control receiver (3) and controllers (1,1'), which are activated by a code generator (7) via the control receiver. The controllers have a decoder (4) providing valid or invalid logic values by comparing the received code with a stored secret code. The controllers have a memory (6) in which different code values are held, the actual and stored values combined via an OR-logic, to provide an activation signal for the control device. ADVANTAGE - Ensures high level of security.